Freezing apparatus.



J. MoA. LONG.

FREEZING APPARATUS.

APPLIQATIOH r1121) SEPT. 21. 1913.

Patented Dec. 1, 1914.

WITNESSES INVENT 3y @qffqrlae% met. 7

JOHN MUAULIFFE LONG, 0F MANCHESTER, ENGLAND.

FREEZING APPARATUS.

Specification of Letters latent.

Patented Dec. 1, 1914.

Application filed September 27,12313. Serial No. 792,187.

T 0 all whom it may concern Be it known that I, JOHN MoAUmrrn Lona, subject of the King of Great Britain, residing at Manchester, England, have invented certain new and useful Improvements in Freezing Apparatus, of which the following is a specification.

One type of apparatus. for making ice cream and analogous material now in use comprises a rotating drum which contains the freezing or cooling material and moves through a pan or dish containing the material to be frozen or cooled. The material becomes frozen and adheres to the periphery of the drum and is removed therefrom by means of a suitable scraper operating upon the periphery of the drum. With such devices the material also becomes frozen on the sides of the drum where it is not convenient for removal into the collecting dishes and special scraping appliances have been tried with the object of collecting this material but so far without satisfactory result.

It is desirable that the operative surface should be as large as possible so long as the material can be efficiently collected from it as the output of the apparatus is rendered greater for the same period of operation.

The object of my present invention is to so construct the drum periphery that the side surfaces of the drum adjacent thereto shall be part of one unbroken peripheral surface which can be operated upon by a simple scraper. To this end '1 form the drum with side surfaces curving into or inclined and then curving into the periphery so that all parts which are exposed to the material to be treated are within the scraping action of a simple curved notch or edge of a scraper, such curve in the scraper being arranged to fit upon the curved drum surface when the scraper is inclined at a suitable angle for collecting the material from the drum and feeding it into any suitable receptacles.

In order that the invention may be thoroughly understood and easily carried into practice I have appended hereunto a sheet of drawings showing my invention.

Figure 1 is a perspective view of the machine with my improvements in use. Fig.

2 is a section through the drum, and Fig. 3

is a detail of a suitable scraper.

On these drawings a 1s abox or recepclosing plug or cap f and through this trunnion the freezing materials are introduced into the drum in the known manner. In this illustrated example I have shown the sides of the drum (Z gradually curving with a curved periphery 9, see Fig. 2. A scraper h is provided as before but this is formed at its end, that is toward the drum with a curved notch 71 that will fit the contour of the drum when the scraper is suitably inclined to feed down the frozen material that is removed from the drum. This position is shown at Fig. 1. The scraper may be provided with turned over side flanges j or these side flanges may be higher so as to prevent the material passing over the sides of the scraper as it is removed from the drum. I do not limit myself to any particular formation of the sides of the scraper however. The drum (Z may when formed curved in this way be readily produced by two dish like pressings joined by welding, soldering or similar methods along the center of the periphery and the joint smoothed off to leave an unbroken outer contour. Or the drummay be formed by two pressed and drawn parts corresponding to a drum divided in the plane of its axis. The parts in this case require further drawing aswill be understood but are easily produced by known pressing and drawing methods.

Having fully described my invention, what I desire to claim and secure by Letters Patent, is

1. A freezing apparatus comprising a container for the material to be treated, a hollow drum rotatable in said container and adapted to hold the freezing material, said drum having a transversely rounded periphery entirely consisting of a single wide curve continuous with and merging into curved or inclined sidewalls, and a scraper having a single wide curved notchfitting the said curved periphery.

2. A freezing apparatus comprising a ing its side flanges turned over inwardly, container for the material to be treated, a substantially as described. hollow drum rotatable in said container and In testimony whereof I have hereunto set adapted to hold the freezing material, said my hand in presence of two subscribing 5 drum having a transversely rounded pe- Witnesses.

riphery entirely consisting of a single Wide curve continuous with and merging into curved or inclined side Walls, and a scraper having a single Wide curved notch fitting 10 the said curved periphery said scraper hav- JOHN MOAULIFFE LONG.

Witnesses:

ERNALD SIMPSON MOSELEY, MALCOLM SMETHURST.

Copies 0;! this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. O. 

